Enable ServiceWorkerMicroBenchmarkPerfTest (service_worker.service_worker_micro_benchmark)

tools/perf/benchmarks/service_worker.py

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import collections
 import page_sets
 import re
 
 from measurements import timeline_controller
 from metrics import speedindex
@@ skipping 168 matching lines @@
 class ServiceWorkerPerfTest(benchmark.Benchmark):
   """Performance test on public applications using ServiceWorker"""
   test = _ServiceWorkerMeasurement
   page_set = page_sets.ServiceWorkerPageSet
 
   @classmethod
   def Name(cls):
     return 'service_worker.service_worker'
 
 
-# Disabled due to redness on the tree. crbug.com/442752
-@benchmark.Disabled
 class ServiceWorkerMicroBenchmarkPerfTest(benchmark.Benchmark):
   """This test measures the performance of pages using ServiceWorker.
 
   As a page set, two benchamrk pages (many registration, many concurrent
   fetching) and one application (Trained-to-thrill:
   https://jakearchibald.github.io/trained-to-thrill/) are included. Execution
   time of these pages will be shown as Speed Index, and TRACE_EVENTs are
   subsidiary information to know more detail performance regression.
   """
   test = _ServiceWorkerMicroBenchmarkMeasurement
   page_set = page_sets.ServiceWorkerMicroBenchmarkPageSet
   @classmethod
   def Name(cls):
     return 'service_worker.service_worker_micro_benchmark'